Construction is a key sector for ArcelorMittal, accounting for 32% of the Company's sales. R&D strategy is to deliver differentiated products and unique design solutions to the sector. As part of that process, our global R&D department just developed a methodology to assess a building and its components based on a number of existing standards (sustainability, comfort, health, cost…). First application was made on an office building developing thus guidelines for 2020 building . The project has applicability to architects, property owners, developers, builders, maintenance and management firms alike. It analyses each of ArcelorMittal's designs and solutions and includes a full life-cycle analysis of the completed building. The project aims also at showcasing the potential of key ArcelorMittal’s product solutions such as the future range of photovoltaic steels developed in the Phoster project and Magnelis®, a metallic coated steel with the ability to self-heal on cut edges.